[mypyc] feat: stararg fastpath when calling fn(*args) with tuple #19623
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@JukkaL @ilevkivskyi I notice other people are somehow Requesting Review for other PRs via the Github UI. I couldn't figure out how to do that but this PR is nice and short, and ready for review. |
BobTheBuidler
changed the title
JukkaL
approved these changes
Aug 13, 2025
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Yeah I also didn't think to do any benchmarking here since the IR shows such a clear improvement. Thanks for merging, I'll rebase those other 3 related PRs for you sometime today. |
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There are 3 safe cases where we can reuse a tuple when calling a python function:
fn(*args)
fn(*args, **kwargs)
fn(*args, k=1, k2=2, **kwargs)
This PR covers the first two cases.
The IR diff will probably demonstrate this change better than I can explain it.